Home / 87,057.12-130,401.36-72,230.88

Finding the Fourth Proportional to 87,057.12, 130,401.36 and 72,230.88

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Solution

The fourth proportional to 87,057.12, 130,401.36 and 72,230.88 is: 108,193.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,057.12 : 130,401.36 = 72,230.88 : x
  2. Step 2: Convert to fraction form
    87,057.12/130,401.36 = 72,230.88/x
  3. Step 3: Cross multiply
    87,057.12x = 130,401.36 × 72,230.88
  4. Step 4: Simplify right side
    87,057.12x = 9,419,004,986.00
  5. Step 5: Solve for x
    x = 9,419,004,986.00/87,057.12
  6. Step 6: Final answer
    x = 108,193.39

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.